Positionally, probably the Ruy Lopez. There are so many subtleties that one can miss, especially in the main lines. Tactically, probably the Grunfled or Najdorf. Strategically, probably the KID main lines.
Most complex openings
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The Italian opening, far more complex than the more straightforward Ruy Lopez.
That is wonderfull, congratulations...
whatever mvl plays
As the title reads, I'm wondering what openings you think are the most complex. Either positionally or tactically, but in my mind I'm thinking more positionally...
Against d4 maybe the Grunfeld. Against e4... probably the Najdorf is up there.
Anyway, your thoughts